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Annotation of loncom/homework/math_parser/Operator.pm, revision 1.2

1.1       damieng     1: # The LearningOnline Network with CAPA - LON-CAPA
                      2: # Parser operator
                      3: #
1.2     ! raeburn     4: # $Id: Operator.pm,v 1.2 2023/03/13 18:30:00 raeburn Exp $
        !             5: #
1.1       damieng     6: # Copyright (C) 2014 Michigan State University Board of Trustees
                      7: #
                      8: # This program is free software: you can redistribute it and/or modify
                      9: # it under the terms of the GNU General Public License as published by
                     10: # the Free Software Foundation, either version 3 of the License, or
                     11: # (at your option) any later version.
                     12: #
                     13: # This program is distributed in the hope that it will be useful,
                     14: # but WITHOUT ANY WARRANTY; without even the implied warranty of
                     15: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
                     16: # GNU General Public License for more details.
                     17: #
                     18: # You should have received a copy of the GNU General Public License
                     19: # along with this program. If not, see <http://www.gnu.org/licenses/>.
                     20: #
                     21: 
                     22: ##
                     23: # Parser operator, like "(".
                     24: ##
                     25: package Apache::math_parser::Operator;
                     26: 
                     27: use strict;
                     28: use warnings;
                     29: use utf8;
                     30: 
                     31: use enum qw(UNKNOWN UNARY BINARY TERNARY);
                     32: 
                     33: ##
                     34: # Constructor
                     35: # @param {string} id - Characters used to recognize the operator
                     36: # @param {integer} arity (Operator::UNKNOWN, UNARY, BINARY, TERNARY)
                     37: # @param {integer} lbp - left binding power
                     38: # @param {integer} rbp - right binding power
                     39: # @param {nudFunction} nud - Null denotation function. Parameters: Parser p. Returns: ENode.
                     40: # @param {ledFunction} led - Left denotation function Parameters: Parser p, ENode left. Returns: ENode.
                     41: ##
                     42: sub new {
                     43:     my $class = shift;
                     44:     my $self = {
                     45:         _id => shift,
                     46:         _arity => shift,
                     47:         _lbp => shift,
                     48:         _rbp => shift,
                     49:         _nud => shift,
                     50:         _led => shift,
                     51:     };
                     52:     bless $self, $class;
                     53:     return $self;
                     54: }
                     55: 
                     56: # Attribute helpers
                     57: 
                     58: sub id {
                     59:     my $self = shift;
                     60:     return $self->{_id};
                     61: }
                     62: sub arity {
                     63:     my $self = shift;
                     64:     return $self->{_arity};
                     65: }
                     66: sub lbp {
                     67:     my $self = shift;
                     68:     return $self->{_lbp};
                     69: }
                     70: sub rbp {
                     71:     my $self = shift;
                     72:     return $self->{_rbp};
                     73: }
                     74: sub nud {
                     75:     my $self = shift;
                     76:     return $self->{_nud};
                     77: }
                     78: sub led {
                     79:     my $self = shift;
                     80:     return $self->{_led};
                     81: }
                     82: 
                     83: 1;
                     84: __END__